首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3461篇
  免费   24篇
财政金融   456篇
工业经济   133篇
计划管理   573篇
经济学   712篇
综合类   14篇
运输经济   29篇
旅游经济   33篇
贸易经济   1028篇
农业经济   66篇
经济概况   220篇
邮电经济   221篇
  2024年   38篇
  2023年   34篇
  2022年   28篇
  2021年   53篇
  2020年   71篇
  2019年   64篇
  2018年   188篇
  2017年   183篇
  2016年   181篇
  2015年   121篇
  2014年   156篇
  2013年   485篇
  2012年   140篇
  2011年   150篇
  2010年   181篇
  2009年   141篇
  2008年   132篇
  2007年   102篇
  2006年   64篇
  2005年   60篇
  2004年   49篇
  2003年   57篇
  2002年   74篇
  2001年   49篇
  2000年   60篇
  1999年   33篇
  1998年   31篇
  1997年   20篇
  1996年   23篇
  1995年   15篇
  1994年   24篇
  1993年   20篇
  1992年   14篇
  1991年   21篇
  1990年   21篇
  1989年   20篇
  1986年   14篇
  1985年   18篇
  1984年   16篇
  1983年   22篇
  1982年   22篇
  1981年   20篇
  1980年   15篇
  1979年   17篇
  1978年   12篇
  1977年   12篇
  1976年   19篇
  1975年   16篇
  1974年   13篇
  1971年   13篇
排序方式: 共有3485条查询结果,搜索用时 15 毫秒
171.
The capabilities based view of the firm is a major approach in current strategic management research. It focuses on organizational capabilities as the fundamental unit of analysis and states that firms evolve through evolutionary processes. What organizational capabilities are and how they emerge and evolve are central research questions. Existing research focuses only on partial aspects of the emergence of organizational capabilities. Hence, an integrative framework to address these issues is missing. This contribution aims at developing such an integrative framework by a critical review of existing research. Different perspectives are combined to explain the emergence and evolution of organizational capabilities while focusing on a lifecycle model. This contribution starts with an explanation and a taxonomy of pivotal terms of the capabilities based view. Different ways of the emergence and the development of organizational competencies and their relationships will be systematically explained by examining theoretical backgrounds of evolutionary economics and path dependency theory. This contribution ends with a summary and discusses future research streams.  相似文献   
172.
Robust Bayesian analyses in a conjugate normal framework have been developed by Learner (1978) and Polasek and Pötzelberger (1987). Fixing the prior mean and varying the prior covariance Matrix yields a so-called feasible ellipsoid for the posterior mean and robust HPD regions, also called HiFi-regions. This paper considers the application of this approach to gain robust Bayesian inference in case of a parameter change in regression models.  相似文献   
173.
Abstract In this paper we propose a straightforward method to derive a non‐inflationary rate of capacity utilization (NIRCU) based on micro data. We condition the current capacity utilization of firms on their current and planned price adjustments. The non‐inflationary capacity utilization rate is then defined as the rate where a firm feels no price adjustment pressure. One of the main advantages is that this methodology uses structural aspects and does not make it necessary to operate with – often rather arbitrary – statistical filters. We show that our aggregate NIRCU performs remarkably well as an indicator of inflationary pressure in a Phillips curve estimation.  相似文献   
174.
    
The dynamics of export market exit and firm closure have found limited attention in the new heterogeneous-firms trade literature. In fact, several of the predictions on firm survival and exit stemming from this new class of models are at odds with the stylized facts. Empirically, higher productivity firms survive longer, most firm closures are young firms, higher productivity exporters are more likely to continue to export compared to less productive exporters and market exits as well as firm closures are typically preceded by periods of contracting market shares. The present paper shows that the simple inclusion of exogenous economy wide technological progress into the standard Melitz (2003) model generates a tractable dynamic framework that generates endogenous exit decisions of firms in line with the stylized facts. Furthermore, we derive the effects of faster technological progress and trade liberalization on export market exit and firm closure.  相似文献   
175.
176.
    
We examine how workers adjust in response to an unexpected job loss. Using the closure of military bases in Sweden, we find that displaced workers experience permanent income losses and immediately adjust along two main channels: regional and sector mobility. Displaced military workers are more likely to move to another municipality, start commuting, and change sectors. We also find that workers with mobility restrictions are less likely to change regions and they exhibit lower earnings in the longer run, a result that might help to explain some of the permanent income losses found in the literature.  相似文献   
177.
Received July 31, 2000; revised version received July 18, 2001  相似文献   
178.
After the breakdown of the communist regime in Romania, collective farms were replaced by a large number of small-scale private farms. Although cooperation seems to be a favourable choice for these smallholders, it did not develop as perhaps expected. This article explores the factors that determine the formation of the intention of Romanian vegetable farmers to join marketing cooperatives in the form of so called producer groups. Our theoretical framework refers to Ajzen’s Theory of Planned Behaviour, which we model with a structural equation model. We identified as main intention drivers the expectation for better prices and easier access to capital. Perceived family support is another significant factor. The level of distrust is high. Although our trust variable is not significant as a predictor of the intention to cooperate in the model, we find qualitative indications that trust plays a role when the intention is translated into actual behaviour.  相似文献   
179.
    
In their seminal work, Im et al. (1997 Im, KS, Pesaran, MH and Shin, Y. 1997. Testing for unit roots in heterogeneous panels. 1997. Working paper, Department of Applied Economics, University of Cambridge. Mimeographed [Google Scholar], 2003 Im, KS, Pesaran, MH and Shin, Y. 2003. Testing for unit roots in heterogeneous panels. Journal of Econometrics, 115: 5374. [Crossref], [Web of Science ®] [Google Scholar]) suggested that time series for several cross-sectional units could be used to increase the power of the Dickey--Fuller unit root test. They argued that when cross-sectional correlation is a problem that can be modelled by a time-specific factor, demeaning across the cross-sectional units can solve the problem. In this study, this proposition is proven valid, but it is also shown that previously supplied standardizing moments are inappropriate when the number of cross-sections are small, causing size to differ from the significance level. To correct this size distortion, the current paper supplies response surface parameters that can be used to obtain moments that are valid when a time-specific factor suffices for modelling cross-sectional correlation in the heterogeneous panel data unit root framework. The correct size of the panel data unit root test comes at the cost of a somewhat lower power against a stationary alternative.  相似文献   
180.
Aims: Data highlighting the cost drivers for non-valvular atrial fibrillation (NVAF) patients in terms of vitamin K antagonist (VKA) treatment and monitoring are lacking in France. This study aimed to evaluate the real-life daily cost of VKA treatment in 2013, in French patients suffering from NVAF.

Methods: This longitudinal observational study was performed using the EGB (Echantillon Généraliste des Bénéficiaires) database, a random sample of the French national insurance (NHI) database, which covers 80% of the population. All adult patients whose first NVAF anticoagulant treatment in 2013 was a VKA were analyzed. Costs were calculated for the duration of follow-up and then divided by the number of days of therapy. The analysis was performed both from the French NHI perspective (amount reimbursed by the NHI) and from a collective perspective.

Results: In this study, 3,254 NVAF patients treated with VKA in 2013 were included, and this sample comprised 52.6% males. The mean daily cost of VKA treatment was €1.13 (±1.18) according to the collective perspective (89.4% of this cost was associated to INR measurement) and €1.05 (±1.16) according to the NHI perspective.

Limitations: As diagnoses associated with procedures are not available in the EGB database, proxies were used, and an algorithm was created to define the AF population.

Conclusions: This analysis is the first to consider an exhaustive spectrum of the costs of VKA treatment in France using EGB data. VKA medication requires exhaustive follow-up, and, thus, associated costs are important. The results of the present study confirmed this close follow-up for VKA patients, making the cost of treatment by VKA nearly 10-times more expensive than the cost of medication itself.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号